Backsiphonage
反虹吸
🗣️ 情景例句
about your math teacher or your math homework.
你的数学老师或你的数学作业。
Don't you have my hat?
你没拿我的帽子吧？
By comparison, ferry trips or cruises offer a great variety of civilized comforts.
相比之下，坐船旅行或环游可以得到文明世界的各种享受。